JPH0236028Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] This invention relates to an air conditioner, and more specifically, to an improvement of a wind direction switching plate in an indoor unit of an air conditioner.

[Technical background of the invention] In general, indoor units of heat pump type air conditioners are designed to quickly cool the required area during rapid cooling, and also to circulate warm air from above to below during heating. In order to make it more effective, the air blowing direction can be changed from the normal horizontal blowing direction to a downward blowing direction 90 degrees downward.

That is, as shown in FIG. 9, inside the housing 1 of the indoor unit, there is a heat exchanger 2 and a cross loaf fan 3 disposed at the lower part of the back side of the heat exchanger 2.
The fan 3 forms an air flow path that sends air downward. In this case, at the bottom of the housing 1, which is the outlet of the air flow path, there is an air outlet 4 connected to the front and bottom surfaces. It is formed. Inside this air outlet 4,
A wind direction switching plate 5 that can be selectively rotated is provided between the bottom surface of the opening and the front face of the opening, and the air direction switching plate 5 allows the air blowing direction to be changed between horizontal blowing (horizontal direction) and downward blowing (horizontal direction). FIG. 9 illustrates a state in which the air direction switching plate 5 is set on the front side of the opening and the air blowing direction is set to the downward blowing direction.

This downward blowing state is mainly performed during heating operation, but when the front side of the opening of the air outlet 4 is blocked with the wind direction switching plate 5, a part of the air sent out from the fan 3 is Since it comes into contact with the back side of the switching plate 5 and forms an eddy flow, this creates resistance and causes a loss in air volume of about 20 to 30%. Accordingly, the heating capacity will also decrease accordingly. In addition, in the above-mentioned downward blowing condition, the blown hot air tends to rise naturally and stagnate in the upper space of the room, so a separate circulator, etc. is required to evenly heat the room. shall be. Furthermore, since the lower position of the air outlet 4 is directly blown with high-velocity hot air, you may feel cold even though you are receiving the warm air, and this may cause discomfort such as messy hair. It was hot.

[Purpose of the invention] This invention was devised in view of the above-mentioned conventional problems.The purpose is to divide the wind direction switching board into a main wind direction switching board and a sub wind direction switching board, and to make it easier to operate as needed. By making it possible to open the auxiliary wind direction switching plate, the air volume loss in the downward blowing state during heating operation can be kept to a minimum value to improve heating capacity, and the temperature distribution in the room can be made more uniform. To provide an air conditioner that provides a wide comfort zone.

[Example] Hereinafter, this invention will be described in detail with reference to an example shown in the accompanying drawings.

This air conditioner is equipped with an indoor unit housing 10 as shown in FIG. As shown in FIG. 2, the housing 10 has a horizontally elongated air outlet extending from its front lower part to the bottom surface, which corresponds to the outlet of the air flow path. 1
1 is provided. A wind direction switching plate 12 is rotatably provided in the air outlet 11, and according to this embodiment, the wind direction switching plate 12 includes:
A first block that closes the front side of the air outlet 11 and blows out the air from the air flow path almost directly downward.
and a second operating position in which the air outlet 11 is rotated toward the upper wall surface.

The wind direction switching plate 12 is composed of a main wind direction switching plate 13 and a sub wind direction switching plate 14, as illustrated in FIG. The main wind direction switching plate 13 is located at the bottom 2/2 of the front opening of the air outlet 11.
The auxiliary wind direction switching plate 14 is made of a belt-shaped plate having a size that covers approximately 1/3 of the remaining upper space. This sub-wind direction switching plate 1
4 is rotatably supported with respect to the main wind direction switching plate 13, and in the first operating position, the main wind direction switching plate 13
located above. That is, according to this embodiment, on the back side of the main wind direction switching plate 13, there is a vertical support shaft 15a rising toward the back side of the sub wind direction switching board 14, and a vertical support shaft 15a that extends from the upper end of the vertical support shaft 15a to the sub wind direction switching board 14.
Horizontal support shaft 15b bent at right angles to the longitudinal direction of
A plurality of rotary support members 15 are provided. On the other hand, on the back side of the secondary wind direction switching plate 14, there is a bearing hole 16 that fits into the horizontal support shaft 15b.
The same number of bearing ribs 16 having a are provided,
By fitting this bearing hole 16b into the horizontal support shaft 15b, the sub-wind direction switching plate 14 is connected to the main wind direction switching plate 1.
It is rotatably supported with respect to 3.

The main wind direction switching plate 13 has a pair of left and right arms 17, 17 protruding from the upper side thereof to the back side,
A rotation support shaft 18 serving as a center of rotation is provided protruding from each proximal end of the arm 17, and bosses 19, 19 are provided protruding from each distal end of the arm 17, respectively. Further, the secondary wind direction switching plate 14 is also provided with a pair of left and right arms 21, 21 that protrude from the upper side thereof to the rear side, and a boss 22 coaxially protrudes from each tip of the arm 21. It is set up. On the other hand, the inner wall 20 defining the air outlet 11 of the housing 10 has a bearing hole 23 that fits with the rotation support shaft 18, and first and second bosses 18 and 22 that correspond to the bosses 18 and 22. guide grooves 24 and 25 are formed.

In this case, each of the first and second guide grooves 24,
25 are both formed along an imaginary arc centered on the bearing hole 23, but the second guide groove 25
One end (the end on the counterclockwise side in FIG. 2) is formed to be wide, thereby controlling the operation of the sub-air direction switching plate 14. That is, this control groove has a front edge step portion 25a against which the boss 22 contacts when the secondary wind direction switching plate 14 is closed, and a lower edge portion 25a against which the boss 22 contacts when the secondary wind direction switching plate 14 is opened. Edge step 25
b, and an engaging stepped portion 25c that comes into contact with the boss 22 and forcibly closes the secondary wind direction switching plate 14 when the secondary wind direction switching plate 14 is rotated above the air outlet 11 together with the main wind direction switching plate 13. It is formed.

Referring to FIG. 4, which is a sectional view taken along the line - in FIG. On the other hand, on the back side of the secondary wind direction switching plate 14, there is a first cam surface 27a that is biased by the leaf spring 26 to hold the secondary wind direction switching plate 14 in the closed position, and and a second cam surface 27b that holds the cam member 2 in the open position.
7 is provided. In this embodiment, the cam member 27 has a bearing hole 16a and also serves as the bearing rib 16.

FIG. 6 shows an example of the mounting structure of one rotational support shaft 18 of the main wind direction switching plate 13 to the housing 10. According to this, this rotational support shaft 18 is attached to the air outlet 11 through a spacer cylinder 31. It is adapted to be attached to one inner wall 20 of the housing 10 defining the housing 10. That is, the rotation support shaft 18 is provided with a key 18a extending in the axial direction thereof, and the spacer cylinder 31 is provided with a key 18a extending in the axial direction of the rotation support shaft 18.
Bearing hole 32 rotatably receives the tip of 8.
and a fan-shaped rotation angle control rod 33 that cooperates with the key 18a to define the rotation range of the main wind direction switching plate 13. Further, a pair of key flanges 34a and 34b are formed on the body 31a of the spacer cylinder 31, and are arranged opposite to each other with an interval of 180 degrees, for example, and a D cut is formed on the end of the body 31a. A shaft 35 is provided in series. On the other hand, a bearing hole 36 into which the body 31a of the spacer cylinder 31 is fitted is bored in the inner wall 20 of the housing, but in this case, the key flange 34a,
A fan-shaped portion 3 with an enlarged diameter notch corresponding to 34b
The angular interval between both end walls 37a and 37b of 7 is made larger than 180 degrees by an angle α. That is, the spacer cylinder 31 is fitted within the bearing hole 36 so that it can rotate by an angle α.

After the spacer cylinder 31 is inserted into the bearing hole 36 in this way, a lever 39 having a D-cut hole 38 of the same shape is attached to the D-cut shaft 35, and this lever 39 and a base frame (not shown) are attached. A tension spring 40 is interposed between them.

In the above configuration, the spring force of the tension spring 40 is transmitted to the spacer tube 31 via the lever 39 and the D-cut shaft 35, and thereby the spacer tube 31 is urged to rotate counterclockwise in FIG. The key flange 34b is held in contact with one end wall 37b of the fan-shaped portion 37. Along with this, the key 18a of the rotation support shaft 18 is pushed by one end wall 33a of the rotation angle control groove 33, so that the main wind direction switching plate 13 moves counterclockwise in FIG. (in the clockwise direction), the front side of the air outlet 11 is held in a closed state. Since an play angle α occurs in the main wind direction switching plate 13
can be pushed back slightly against the tension spring 40.

Therefore, the air outlet 11 is
In the state shown in FIG. 4 in which the front side of the main airflow direction switching plate 13 is closed and the hot air generated in the housing 10 is blown out exclusively from the bottom side of the air outlet 11, the lower end of the main airflow direction switching plate 13 is rotated counterclockwise. When slightly rotated in the direction of arrow A, the boss 22 at the upper end of the secondary wind direction switching plate 14 comes into contact with the front edge step 25a of the control groove and cannot move forward any further. The end passes over the first cam surface 27a and moves to the second cam surface 27b, and the secondary wind direction switching plate 14 is rotated clockwise around the horizontal support shaft 15b by the biasing force of the leaf spring 26. 7 to automatically open the upper front side of the air outlet 11 as shown in FIG. In addition, after the above operation, the main wind direction switching plate 13
When you let go of the main wind direction switching plate 13, the tension spring 4
0 returns to the original state. As a result, most of the warm air sent out from inside the housing 10 is blown out from the bottom side of the air outlet 11 in a downward blowing state, but some of the warm air is blown out from the sub-air direction switching plate 14. It will be blown out towards the front. Therefore, as in the conventional case, the wind direction switching plate 12
Since there is almost no eddy flow generated on the back side of the Since the relatively low-temperature warm air passes through the lower part where the exchange area is small, the warm air blown out from the bottom side of the air outlet 11 does not fly up into the upper space of the room as in the conventional case, but instead flows in this sub-air direction. The relatively low-temperature warm air from the switching plate 14 is suppressed and spreads into the lower space of the room, resulting in a wider comfort zone. Moreover, according to this configuration, since hot air is blown out from the bottom side of the air outlet 11 and the sub-air direction switching plate 14 as described above, the wind speed of the warm air blown out from the bottom side of the air outlet 11 is increased. It will be relatively weakened, and even in the position directly below it, you will not experience the discomfort that you would experience in the past.

On the other hand, in order to close the secondary wind direction switching plate 14, it may be forcibly closed by hand, but according to this embodiment, by rotating the main wind direction switching plate 13 upward (clockwise in FIG. 7), Closed automatically. That is, when the secondary wind direction switching plate 14 is in the open state, the boss 22 is in contact with the lower edge step 25b of the control groove. When the boss 22 is rotated clockwise in FIG. 7 about the center, in the process the boss 22 comes into contact with the engagement step 25c of the control groove and finally overcomes it. As a result, the sub-wind direction switching plate 14 is connected to the horizontal support shaft 1
5b in the counterclockwise direction in the same figure, as shown in FIG.
6 changes from the second cam surface 27b to the first cam surface 27a, and the sub wind direction switching plate 14 forms one wind direction switching plate 12 together with the main wind direction switching plate 13. It will remain closed.

[Effect] As is clear from the above description of the embodiment, according to this invention, the wind direction switching plate 12 is divided into the main wind direction switching plate 13 and the sub-wind direction switching plate 14, and the sub-wind direction switching plate 14 is divided into the main wind direction switching plate 13 and the sub-wind direction switching plate 14 during heating operation. By opening the opening and blowing relatively low-temperature warm air from there, it is possible to reduce air volume loss and improve heating capacity, and the warm air blown from the bottom side of the air outlet 11 can be used indoors. It is possible to diffuse the air to a more distant area in the lower space of the room, thereby making it possible to equalize the indoor temperature. Moreover, according to this invention, the main wind direction switching plate 1
The secondary wind direction switching plate 14 can be changed by simply pressing 3 slightly.
It is very convenient to use because it opens automatically.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing an embodiment of an indoor unit of an air conditioner according to this invention, Fig. 2 is a sectional view showing the air outlet of the indoor unit, and Fig. 3 is the same as Fig. 1. FIG. 4 is a rear view of the illustrated wind direction switching plate, FIG. 4 is a sectional view taken along the - line in FIG. 3, and FIG. 5 shows the relationship between one end of the wind direction switching plate and the corresponding side wall of the air outlet. A perspective view, FIG. 6 is an exploded perspective view showing the state in which the other end of the wind direction switching plate is attached to the side wall of the corresponding air outlet, and FIG. 7 is a sectional view showing the auxiliary wind direction switching board in an open state. , FIG. 8 is a sectional view showing a state in which the auxiliary wind direction switching plate is closed in relation to the rotational operation of the main wind direction switching plate, and FIG. 9 is a schematic sectional view of essential parts of a conventional indoor unit. In the figure, 10 is a housing, 11 is an air outlet, 12 is a wind direction switching plate, 13 is a main wind direction switching plate, 1
4 is a sub-wind direction switching plate, 15 is a rotation support member, 16 is a bearing rib, 17, 21 is an arm, 19, 22 is a boss, 23 is a bearing hole, 24, 25 is a guide groove, 26
is a leaf spring, 27 is a cam member, 31 is a spacer tube,
33 is a rotation angle control groove, 34 is a key flange, 35
is the D-cut axis.

Claims (1)

[Claims for Utility Model Registration] (1) An indoor unit housing having an air flow path including a heat exchanger and a blower, and an air opening from the lower front of the housing to the bottom surface corresponding to the outlet of the air flow path. It includes an air outlet and a wind direction switching plate that is selectively rotated between a first operating position in which the front side of the air outlet is closed and a second operating position that is stored along the upper wall surface of the air outlet. The air conditioner is an air conditioner comprising: a main wind direction switching plate that is located on the lower side in the first operating position; A secondary wind direction switching plate is rotatably supported against the main wind direction switching plate, and a leaf spring rising along the back side of the secondary wind direction switching plate is provided on the back side of the main wind direction switching plate. A cam member is provided on the back side of the wind direction switching plate, and includes a first cam surface that is biased by the leaf spring and holds the sub wind direction switching plate in the closed position, and a second cam surface that holds the sub wind direction switching plate in the open position. By slightly rotating the main wind direction switching plate in a predetermined direction in a state where the leaf spring is in contact with the first cam surface and the secondary wind direction switching plate is closed, the leaf spring is transitions from the first cam surface to the second cam surface and the sub-air direction switching plate is automatically opened, wherein the upper side of the sub-air direction switching plate is located inside the housing of the air outlet. A boss is provided that protrudes toward the wall, and a first boss is provided on the inner wall side that engages with the boss when the secondary wind direction switching plate is opened and prevents its upper end from moving forward. and the wind direction switching plate with the second engagement step.
When rotating to the operating position, the auxiliary wind direction switching plate is forcibly rotated by contacting the boss to shift the engagement position of the leaf spring from the second cam surface to the first cam surface. An air conditioner characterized in that a guide groove including two engaging step portions is formed. (2) The air conditioner according to claim (1), wherein the guide groove is formed along an imaginary arc centered on the rotational axis of the main wind direction switching plate.